exam Maths Puzzle Numerical Ability

(8x^-5)(-2x^3)^4
I am so confused, could someone please explain.

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exam Other Question

Subtract. write in simplest form.
2x/x-3 - 6/x-3 Two people arrive at a restaurant independently. Their arrival times are random and uniformly distributed between 5:00 p.m. and 6:00 p.m.(no moment in this interval is any more lik